The Chevy SS is one of the best cars no one's buying. But with the addition of a manual transmission and GM's Magnetic Ride Control suspension for 2015, this under-appreciated sedan is a seriously compelling package. Take notice.

Last year Porsche sold 47,000 vehicles in the US market, with seven different models. Corvette sold 35,000 cars with one. Imagine what Corvette could do as a standalone brand with more models in its lineup.